#include "stm32f10x.h"                  // Device header
#include <stdio.h>
#include <stdarg.h>

char Serial_RxData;
uint8_t Serial_RxFlag;

void Serial_Init(void)
{
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
    
    GPIO_InitTypeDef GPIO_InitSturcture;
    GPIO_InitSturcture.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitSturcture.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitSturcture.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA,&GPIO_InitSturcture);
    
    GPIO_InitSturcture.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_InitSturcture.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitSturcture.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA,&GPIO_InitSturcture);
    
    USART_InitTypeDef USART_InitStructure;
    USART_InitStructure.USART_BaudRate = 9600;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_Init(USART1,&USART_InitStructure);
    
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
    
    NVIC_InitTypeDef NVIC_InitStructure;
    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_Init(&NVIC_InitStructure);
    
    USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
    
    USART_Cmd(USART1,ENABLE);
}

void Serial_SendByte(uint8_t Byte)
{
    USART_SendData(USART1,Byte);
    while(USART_GetFlagStatus(USART1,USART_FLAG_TXE) == RESET);
}

void Serial_SendByteArray(uint8_t *Array,uint16_t Length)
{
    uint16_t i;
    for(i = 0; i < Length; i++)
    {
        Serial_SendByte(Array[i]);
    }
}

void Serial_SendString(char *String)
{
    uint8_t i;
    for(i = 0; String[i] != '\0';i++)
    {
        Serial_SendByte(String[i]);
    }
}

uint32_t Serial_Pow(uint32_t X, uint32_t Y)
{
    uint32_t i,Result = 1;
    
    for(i = 0;i < Y;i++)
    {
        Result *= X; 
    }
    return Result;
}

void Serial_SendNum(uint16_t Number,uint8_t Length)
{
    uint8_t i;
    for(i = 0;i < Length;i++)
    {
        Serial_SendByte(Number / Serial_Pow(10,Length - i - 1) % 10 + '0');
    }
}

//int fputc(int ch,FILE *f)
//{
//    Serial_SendByte(ch);
//    return ch;
//}

//void Serial_Printf(char *format, ...)
//{
//	char String[100];
//	va_list arg;
//	va_start(arg, format);
//	vsprintf(String, format, arg);
//	va_end(arg);
//	Serial_SendString(String);
//}

uint8_t Serial_GetRxData(void)
{
    return Serial_RxData;
}

uint8_t Serial_GetRxFlag(void)
{
    if(Serial_RxFlag)
    {
        Serial_RxFlag = 0;
        return 1;
    }
    return 0;
}

void USART1_IRQHandler(void)
{
    if(USART_GetITStatus(USART1,USART_IT_RXNE) == SET)
    {
        Serial_RxData = USART_ReceiveData(USART1);
        Serial_RxFlag = 1;
        USART_ClearITPendingBit(USART1,USART_IT_RXNE);
    }
}
